Hormone steroid
The hormones steroids are Stéroïde S behaving as Hormone S. One can gather them in five categories according to their receiving S: the Glucocorticoïde S, the Mineralocorticoid S, the Androgen S, the estrogen S and the Progestagène S. the derivatives of the Vitamine D form a sixth hormonal system near to the precedents, but technically speaking it is about Stérol S rather than about steroids.
Cholesterol in the Gonad S and Adrenal nipple S. Steroid hormones are generally carried in the blood bound to specific carrier Protein S such ace sex hormone binding globulin gold corticosteroid binding globulin. Further conversions and catabolism occurs in the liver, other " peripheral" tissues, and in the target tissues.
Because steroids and sterols soluble are Lipid, they edge diffuses fairly freely from the blood through the Cell membrane and into the Cytoplasm off target concealments. In the cytoplasm the steroid may gold may not undergo year Enzyme - mediated deterioration such ace reduction, hydroxylation, gold aromatization. In the cytoplasm, the steroid binds to the specific receptor, has broad metalloprotein assembled from two gold more separately synthesized proteins. In most off the hormone systems known, binding results in cleavage off has smaller protein from the receptor. Cleavage off this " heat shock protein" may occur in either the cytoplasm gold the nucleus. Ounce in the nucleus, the steroid-receptor ligand binds to DNA in chromatin and induces transcription off its target Gene S. -->
Principal natural hormones steroids human
- the Glucocorticoïde S
- the Cortisol
- Mineralocorticoid S
- the Aldosterone
- the sexual steroids
- Androgen S
- the Testosterone
- the Déhydroépiandrostérone (DHEA)
- sulfate of déhydroépiandrostérone (DHEAS)
- the Androstènedione
- the Dihydrotestostérone (DHT)
- estrogen S
- the Progestatif S
- the Progesterone
Principal hormones containing sterols
- derivatives of the Vitamin D
- the Calcitriol
Other hormones steroids in the living organisms
The Ecdysone and the ecdystéroïdes (hormones of Moults of the Arthropods), which one also finds in significant amounts in many plants (phytoecdystéroïdes).The Brassinostéroïdes (hormones of development of the plants)
Examples of hormones steroids of synthesis
Some examples of hormones steroids of synthesis:- Glucocorticoïde S: the Prednisone, the Dexaméthasone, the Mineralocorticoid Triamcinolone
- S: the Fludrocortisone
- Vitamin D: the Dihydrotachystérol
- Androgen S: the Oxandrolone, the Decadurabolin (also called steroids anabolics)
- Estrogen S: the Diéthylstilbestrol
- Progestagène S: the Noréthindrone, the Acetate of médroxyprogestérone
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